Flaming-arc lamp.



S. H. BLAKE.

FLAMING ARC LAMP.

APPLIOATION FILED JULY 13, 1909.

1,104,339, Patented Jul 21, 191i 3 SHEETSSHEET l.

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0 e Fig l 26 zs za' Witnesses Inventor:

' Samuel H. eke, ZZ by S, H. BLAKE.

PLAMING ARC LAMP.

APPLICATION FILED JULY 13, 1909.

Patented July 21, 1914.

3 SHEETS-SHEET 2.

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s. H. BLAKE. FLAMING ABC LAMP.

APPLIOATION FILED JULY 13, 1909.

1,104,339, Patented July 21, 1m

3 SHEETS-SHEET 3.

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Witnesses UNITE D strArns PATENT OFFICE.

SAMUEL H. BLAKE, OF PITTSFIELD, MASSACHUSETTS, ASSIGNOB TO G-IlallVIlilRAB ELECTRIC COMPANY, A CORPORATION OF NEW YORK.

' rLmme-mo Specification of Letters ratent. Y Application filed July 13, 1909. Serial 80. 5075369.

To all whom it may concern:

Be it known that I SAMUEL H. BLAKE, a

citizen of the United States, residing at Pittsfield, in the county of Berkshire, State '5' of Massachusetts, have invented certain new and useful Improvements in Flaming-Arc Lamps, of which the following is a specification. I

This invention relates to electric are lamps, and its object is to improve and simplify boththe feeding mechanism and certain other details of the. lamp, all as here inafter fully set forth. The lamp in question belongs to that class in which the elec- 5 trodes areinclined downwardly toward a common meeting point, the feed being by gravity when the electrode holders are released. The'arc is struck by separating the tips of the electrodes in a direction transverse to their lines of feed. In the resent invention the closing of the circuit t rough the series magnet by which this is accomplished also sets a brake which prevents further downward feed of the electrodes. This action takes place while the arc is being'established so that when it,is fully established and during the normal operation of the lamp downward feed of the electrodes is prevented. A springis interposed between 80 the armature of the magnet and said. system, to facilitate the-operation. vAn elec- 1 tro-magnet in'series wlth the are has its poles arranged .to steady thearc in operation and to blow it out in case it approaches l Details of construction will be set forth in the following descriptiom'and the features of novelty will be particularly pointed out in the claims.

In the accompanying drawings, Figure 1 is a perspective'view of the lamp; Fig. 2 is y a perspective, view showing the series and shunt magnets; Fig. '3 is a side view with the magnets removed and. certain parts in section; Fi dis a similar'viewbroken away to show t e brake operating mechanism; Fig. 5 is a-vertical section of the'series and shunt magnets showingjthe'in, I es andfl ar- 60. matures Fig. '6 is a transverse ertical section of the same; 7 shows the mode of' attaching the armature to the s stem of rods and levers'above mentioned; 8 shows .the screw ,escapement shaft and t carrier-g said screw shaft; and also the step bearing for said shaft; Fig. 10 is a plan of the brake for said shaft; and Fig. 11 is a diagram of the lamp circuits.

At the upper end of the lamp is a top plate. 1, secured to the under side of the canopy 2, and provided on opposite sides with pairs of lugs 3,to.which are fastened the upper ends of the pairs of-straight parallel bars 4, 4 These pairs converge downwardly to a yoke 5 passing between'said pairs of bars and having transverse arms 6, 6 extending in opposite directions beyond the bars, which are secured to said arms near the yoke. From the ends of said yoke depend iron rods 'or hangers 7 to whose extremities is attached an annular iron plate 8 Pole pieces 10 are secured to the hangers 7 and extend radially toward each other above the economizer. On the pole pieces rests a "disk 11 'of insulating material.

There are two cross heads 12, one sliding in the guideway formed by the pair of bars i, and the other in the guld'eway formed by the bars 4, and each carries an insulated electrode holder 13 having jaws in which one or more carbons or 'otherelectrodes m, 3

ings show two carbons m 21:, 3/ 'y in each holder, but the number is immaterial, it being possibletouse one, or three, or any convenient number. At the upper end of each cross head is a grooved roller 15 which is re- 86 dangerously near the economizer of the, ceived between two parallel horizontal rods lam 16 extending from a carrier 17 which is shaft 18 stepped on a pivot pin 18' in, the yoke 5 and journaled at its upper end in the "top plate 1. This shaft contains a helical groove 19 of long pitch, in which engages a through holes in lugs 2'2 on the -carrier,'retains the pin 20 in place and permits of its ready removal. The pitch of the groove 19 is so-stee. that if the shaft is free to rotate the weig t of the'carrier, electrode holders and electrodes will causethem to dro and feed the, electrodes downward. In or or to prevent,"thiswhen the feeding has been 'ac- A disk or brake wheel 23 is secured to the shaft at its upper end with which cooperates a curved brake lever 24 fulorumed on the 65 Fig. 9 shows a section of nut working on; top plate 1 {and havinga downwardly and Patented July 21, 1914.

'on which is supported the economizer 9.

can be clamped by a screw 14:. The drawmounted to slide up and down on a vertical Y pin 20 on the carrler. A cotter pin 21, thrust complished, I provide a brakefor the shaft.

laterally projecting lug 25 containing a. recess in which engages a short arm 26 on a lever 27 fulcrumed ona member 28 clamped to a post 28 depending from the top plate. A weight 29 on said lever urges the brake lever against the brake wheel and thus locks the shaft 18 against rotation.

In order to unlock the shaft when the voltage drop across the arc becomes so great that the shunt coils overpower the series coils, a pull rod 30 is provided, having a I lost-motion connection with the lever 27, the

end of lever 27 being received in a slot in the upper end of the rod- 30 as shown in Fi 1 so that it does not actuate said lever untll near the end of its downward pull. The pull rod is pivotally connected to a connecting rod 31,:b0th rods being adjustable in length, as by cans of the screw-threaded portion 32. T e rod is ivoted to a rock arm 33 on a rock shaft 34 ournaled in the endsof the arm 6. A second rock arm 35 on shaft 34 on the opposite side of the lamp is connected to a rod 36 which is controlled by the lamp magnets, being moved upwardly by the series coils and downwardly by the shunt coils. When the latter operation occurs, the brake lever will be actuated and the shaft 18 unlocked. 1 i

There are preferably two series coils 37 and two shunt coils 38, connected by a frame 39 and depending from a bracket 40 attached' to one of each pair of individual bars 4, 4. The two sets of coils are superposed in line with each other, -theseries coils being uppermost. The movable cores 41 are connected by a cross piece 42, thusforming an H-shaped armature. The cross piece passes through and. is attached to the lower side of a loop 43 composed of a flat steel spring, whose upper side is secured to a flat upright hook-strip 44 containing a notch 45 which engages a transverse pin 46 in the bifurcated end of a block 47 to which the upper end of the rod 36 is secured. A clip 48 attached to the block retains the strip and the pin in engagement. The plunger 49 of'a dash pot 50 is pivoted to the block 47; said dash pot being suspended, from an upright 51 rising from the bracket 40. A rigid stop" .52 depends fromthe strip. 44 between the cross piece 42 and'the lower member of the. loop 43, so that after a predetermined up ward movement of the cross piece, a hammer blow will be given to the rod' 36. It is well known. that the vibration produced by thearmature of the operating magnet in arc lamps, particularly of the alternatlng type, operates in such a way as to produce a. disagreeable flickering of the arc. The yield-- ing 100 of spring steel permits a certain fluctuatlon ofthe armature without afiect-' ing the system of rods and levers connected thereto and thereby overcomes the difiiculty referred to. The electrodes in the holder the other binding post.

sliding between the bars 4' run down through a guide 53 secured to, but insulated from, the bars 4, which are carried down below the arms 6, so that the guide is close to the disk 11. The electrodes depending from the other holder pass through a wide opening 54 in the disk and a similar opening 55 in the ,economizer. They are also engaged by a sled 56 resting on the economizer and connected by an insulating joint with the lower end of'a rock-arm 57 depending from a rock shaft 58 journaled in the arms 6. An upright arm 59 on said shaft is connected by a link 60 with the end of the rockarm 35 at the point where, the rod 36 is' mits the parts actuated thereby to drop to the position shown in Fig. 3, the rock arm .35 and the link 60 lie in the same straight line and the sled is pushed in so that its electrode approaches the other. This dropping of the armature releases the brake, so

that the electrodes feed down until they touch and reestablish the circuit between them. This closing of the circuit energizes the series magnets, which lift the armature and the rod 36 to the position shown in Fig. 4. Duringthe first portion of such movement the pull-rod is lifted, permitting the weight 29 to reset the brake. The succeeding portion of the upward movement of the armature causes'the link 60 to rock the shaft 58 and retract the sled 56 to the position shown in Fig. 4, thus striking the arc. The movement of the system of rods and shafts is facilitated by the weight 61 on a lever 62 fulcrumed on a cross bar 63 secured to the bars 4, 4, and engaging with the connecting rod 31; said weight acting to partly counterbalance the armature, and the rods 30, 31 and 36.

' The line terminals are connected-with the binding posts 64 on the canopy and the circuit is from one of these to the series magnets, thenceby the wire 65 to two coils 66 wound on the'hangers 7, thence b wire 67 to an insulated support 68 near t e top of the lamp, thence by the flexible conductor 69 to one of the electrode holders, and finally from the other holder by the flexible conductor 70 to the. rod 71 depending from The shunt coils are connected across the are by conductor 72 attached to the wire 67 and by conductor 73 attached to the rod 74 insufield between the pole pieces 10, the former serving to steady the arc, while the latter operates to disrupt it in case it gets dangerv ously near the economizer.

, moved for repair or replaced by new ones.

The coils are all attached together, as has been set forth, and are suspended from the bracket 40 by screw threaded studs 7 5 passing up through holes in said bracket and secured by nuts '7 6. To remove the coils, one needs only to take ofi these two nuts and the clip 48, and unhook the strip 44 from the pin 46 in the block 47. The coils can thus be taken off without disturbing the rest of the lamp mechanisms. This, and the ease with which the magnets can again be placed in position, is a feature of particular utility in lamps of this general character where only a very restricted space can be allotted drop into contact with each other, the toggle holds the sled rigidly and resists any tendency of the electrodes to drop so far that they would not separate when the series magnets pick up the armature.

What I claim as new and desire to secure by Letters Patent of the United States, is 1. An arc lamp having a frame compris- 1ng a to plate, two pairs of parallel bars secured t ereto and converging downwardly, a yoke having arms to which the lower ends of said bars are secured, hangers dependmg from said yoke, an economizer supported by means of said hangers, and pole pieces on said hangers.

' 2. An arc lamp having a frame comprismg a top plate,two pa rs of parallel bars secured thereto and convergingdownwardly, an electrode holder sliding between the bars of each pair, a yoke having arms secured to the lower end of said bars, hangers depending from said yoke, coils on said hangers in series with said holders, and an economizer supported by means of said hangers.

3. An arc lamp having downwardly converging guideways, electrode holders sliding freely along said guideways, electrodes carried by said holders, a carrier having laterally extending rodsfengaging with said holders, a screw shaft of long pitch engaging with said carrier, a brake controlling said shaft, a pull rod having a lost-motion con nection' with said brake, a rock shaft connected with said rod, a laterally movable plate through which one of said electrodes passes, and lamp magnet coils havin an armature connected with said rock siaft and with said movable plate.

4. An arc lamp having downwardly converging electrodes, feeding mechanism for such electrodes, a laterally movable sled engaging one electrode, a rock shaft connected with said sled, a brake lever for locking said feeding mechanism, a pull rod connected to said lever, a second rock shaft, connections between the second rock shaft and the rod for actuating the latter, lamp magnet coils provided with an armature, connections between said armature and the second rock shaft for operating the same and connections between the two rock shafts for operating the former from the latter.

In witness whereof, I have hereunto set my hand this 10th day of July, 1909.

SAMUEL H. BLAKE. 

